diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/EntityMapping.kt b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/EntityMapping.kt
index a8a56f560..674cf7d3d 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/EntityMapping.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/EntityMapping.kt
@@ -22,7 +22,7 @@ fun Collection<TagEntity>.toMangaTags() = mapToSet(TagEntity::toMangaTag)
 
 fun Collection<TagEntity>.toMangaTagsList() = map(TagEntity::toMangaTag)
 
-fun MangaEntity.toManga(tags: Set<MangaTag>, chapters: List<ChapterEntity>?) = Manga(
+fun MangaEntity.toManga(tags: Set<MangaTag>, chapters: List<ChapterEntity>?) = Manga( // TODO
 	id = this.id,
 	title = this.title,
 	altTitle = this.altTitle,
@@ -65,7 +65,7 @@ fun Manga.toEntity() = MangaEntity(
 	publicUrl = publicUrl,
 	source = source.name,
 	largeCoverUrl = largeCoverUrl,
-	coverUrl = coverUrl,
+	coverUrl = coverUrl.orEmpty(),
 	altTitle = altTitle,
 	rating = rating,
 	isNsfw = isNsfw,
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaEntity.kt b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaEntity.kt
index e2c474399..9156db7b7 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaEntity.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/db/entity/MangaEntity.kt
@@ -14,7 +14,7 @@ data class MangaEntity(
 	@ColumnInfo(name = "url") val url: String,
 	@ColumnInfo(name = "public_url") val publicUrl: String,
 	@ColumnInfo(name = "rating") val rating: Float, // normalized value [0..1] or -1
-	@ColumnInfo(name = "nsfw") val isNsfw: Boolean,
+	@ColumnInfo(name = "nsfw") val isNsfw: Boolean, // TODO change to contentRating
 	@ColumnInfo(name = "cover_url") val coverUrl: String,
 	@ColumnInfo(name = "large_cover_url") val largeCoverUrl: String?,
 	@ColumnInfo(name = "state") val state: String?,
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/core/parser/external/ExternalPluginContentSource.kt b/app/src/main/kotlin/org/koitharu/kotatsu/core/parser/external/ExternalPluginContentSource.kt
index a0ca968e2..f59514e90 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/parser/external/ExternalPluginContentSource.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/parser/external/ExternalPluginContentSource.kt
@@ -82,7 +82,7 @@ class ExternalPluginContentSource(
 			publicUrl = details.publicUrl.ifEmpty { manga.publicUrl },
 			rating = maxOf(details.rating, manga.rating),
 			isNsfw = details.isNsfw,
-			coverUrl = details.coverUrl.ifEmpty { manga.coverUrl },
+			coverUrl = details.coverUrl.ifNullOrEmpty { manga.coverUrl },
 			tags = details.tags + manga.tags,
 			state = details.state ?: manga.state,
 			author = details.author.ifNullOrEmpty { manga.author },
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/String.kt b/app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/String.kt
index 3294e66fb..dfc16562e 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/String.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/core/util/ext/String.kt
@@ -8,7 +8,7 @@ import org.koitharu.kotatsu.parsers.util.ellipsize
 import org.koitharu.kotatsu.parsers.util.levenshteinDistance
 import java.util.UUID
 
-inline fun <C : CharSequence?> C?.ifNullOrEmpty(defaultValue: () -> C): C {
+inline fun <C : R, R : CharSequence?> C?.ifNullOrEmpty(defaultValue: () -> R): R {
 	return if (this.isNullOrEmpty()) defaultValue() else this
 }
 
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/details/ui/DetailsActivity.kt b/app/src/main/kotlin/org/koitharu/kotatsu/details/ui/DetailsActivity.kt
index 09cf1fef3..5716d6e30 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/details/ui/DetailsActivity.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/details/ui/DetailsActivity.kt
@@ -225,7 +225,7 @@ class DetailsActivity :
 			R.id.imageView_cover -> {
 				val manga = viewModel.manga.value ?: return
 				router.openImage(
-					url = manga.largeCoverUrl.ifNullOrEmpty { manga.coverUrl },
+					url = manga.largeCoverUrl.ifNullOrEmpty { manga.coverUrl } ?: return,
 					source = manga.source,
 					anchor = v,
 				)
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/download/ui/worker/DownloadWorker.kt b/app/src/main/kotlin/org/koitharu/kotatsu/download/ui/worker/DownloadWorker.kt
index c21a07a75..bf6a38955 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/download/ui/worker/DownloadWorker.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/download/ui/worker/DownloadWorker.kt
@@ -204,7 +204,7 @@ class DownloadWorker @AssistedInject constructor(
 					format = task.format ?: settings.preferredDownloadFormat,
 				)
 				val coverUrl = mangaDetails.largeCoverUrl.ifNullOrEmpty { mangaDetails.coverUrl }
-				if (coverUrl.isNotEmpty()) {
+				if (!coverUrl.isNullOrEmpty()) {
 					downloadFile(coverUrl, destination, repo.source).let { file ->
 						output.addCover(file, getMediaType(coverUrl, file))
 						file.deleteAwait()
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/adapter/MangaListItemAD.kt b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/adapter/MangaListItemAD.kt
index 8bf9ea8d7..c8ff4a504 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/adapter/MangaListItemAD.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/adapter/MangaListItemAD.kt
@@ -5,7 +5,6 @@ import androidx.lifecycle.LifecycleOwner
 import coil3.ImageLoader
 import coil3.request.allowRgb565
 import coil3.request.transformations
-import com.google.android.material.badge.BadgeDrawable
 import com.hannesdorfmann.adapterdelegates4.dsl.adapterDelegateViewBinding
 import org.koitharu.kotatsu.core.ui.image.TrimTransformation
 import org.koitharu.kotatsu.core.ui.list.AdapterDelegateClickListenerAdapter
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaCompactListModel.kt b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaCompactListModel.kt
index fae6ccfb1..d7c122492 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaCompactListModel.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaCompactListModel.kt
@@ -7,7 +7,7 @@ data class MangaCompactListModel(
 	override val id: Long,
 	override val title: String,
 	val subtitle: String,
-	override val coverUrl: String,
+	override val coverUrl: String?,
 	override val manga: Manga,
 	override val counter: Int,
 	override val progress: ReadingProgress?,
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaDetailedListModel.kt b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaDetailedListModel.kt
index 8b6633788..ee83aa9b8 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaDetailedListModel.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaDetailedListModel.kt
@@ -8,7 +8,7 @@ data class MangaDetailedListModel(
 	override val id: Long,
 	override val title: String,
 	val subtitle: String?,
-	override val coverUrl: String,
+	override val coverUrl: String?,
 	override val manga: Manga,
 	override val counter: Int,
 	override val progress: ReadingProgress?,
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaGridModel.kt b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaGridModel.kt
index 244c3f7b7..52007c3b5 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaGridModel.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaGridModel.kt
@@ -6,7 +6,7 @@ import org.koitharu.kotatsu.parsers.model.Manga
 data class MangaGridModel(
 	override val id: Long,
 	override val title: String,
-	override val coverUrl: String,
+	override val coverUrl: String?,
 	override val manga: Manga,
 	override val counter: Int,
 	override val progress: ReadingProgress?,
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaListModel.kt b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaListModel.kt
index 322bf0b6a..4afb11370 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaListModel.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/model/MangaListModel.kt
@@ -11,7 +11,7 @@ sealed class MangaListModel : ListModel {
 	abstract val id: Long
 	abstract val manga: Manga
 	abstract val title: String
-	abstract val coverUrl: String
+	abstract val coverUrl: String?
 	abstract val counter: Int
 	abstract val isFavorite: Boolean
 	abstract val progress: ReadingProgress?
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/preview/PreviewFragment.kt b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/preview/PreviewFragment.kt
index 38aeb9465..5d57eec24 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/preview/PreviewFragment.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/list/ui/preview/PreviewFragment.kt
@@ -82,7 +82,7 @@ class PreviewFragment : BaseFragment<FragmentPreviewBinding>(), View.OnClickList
 			)
 
 			R.id.imageView_cover -> router.openImage(
-				url = manga.largeCoverUrl.ifNullOrEmpty { manga.coverUrl },
+				url = manga.largeCoverUrl.ifNullOrEmpty { manga.coverUrl } ?: return,
 				source = manga.source,
 				anchor = v,
 			)
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/local/data/input/LocalMangaParser.kt b/app/src/main/kotlin/org/koitharu/kotatsu/local/data/input/LocalMangaParser.kt
index e4fd0115a..4030ce38e 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/local/data/input/LocalMangaParser.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/local/data/input/LocalMangaParser.kt
@@ -34,7 +34,6 @@ import org.koitharu.kotatsu.local.domain.model.LocalManga
 import org.koitharu.kotatsu.parsers.model.Manga
 import org.koitharu.kotatsu.parsers.model.MangaChapter
 import org.koitharu.kotatsu.parsers.model.MangaPage
-import org.koitharu.kotatsu.parsers.model.MangaSource
 import org.koitharu.kotatsu.parsers.util.runCatchingCancellable
 import org.koitharu.kotatsu.parsers.util.toFileNameSafe
 import java.io.File
@@ -61,7 +60,7 @@ class LocalMangaParser(private val uri: Uri) {
 		val mangaInfo = index?.getMangaInfo()
 		if (mangaInfo != null) {
 			val coverEntry: Path? = index.getCoverEntry()?.let { rootPath / it } ?: fileSystem.findFirstImage(rootPath)
-			mangaInfo.copyInternal(
+			mangaInfo.copy(
 				source = LocalMangaSource,
 				url = rootFile.toUri().toString(),
 				coverUrl = coverEntry?.let { uri.child(it, resolve = true).toString() }.orEmpty(),
@@ -72,7 +71,7 @@ class LocalMangaParser(private val uri: Uri) {
 						if (path != null && !fileSystem.exists(rootPath / path)) {
 							null
 						} else {
-							c.copyInternal(
+							c.copy(
 								url = path?.let {
 									uri.child(it, resolve = false).toString()
 								} ?: uri.toString(),
@@ -271,44 +270,5 @@ class LocalMangaParser(private val uri: Uri) {
 		private fun String.fileNameToTitle() = substringBeforeLast('.')
 			.replace('_', ' ')
 			.replaceFirstChar { it.uppercase() }
-
-		private fun Manga.copyInternal(
-			url: String = this.url,
-			coverUrl: String = this.coverUrl,
-			largeCoverUrl: String? = this.largeCoverUrl,
-			chapters: List<MangaChapter>? = this.chapters,
-			source: MangaSource = this.source,
-		): Manga = Manga(
-			id = id,
-			title = title,
-			altTitle = altTitle,
-			url = url,
-			publicUrl = publicUrl,
-			rating = rating,
-			isNsfw = isNsfw,
-			coverUrl = coverUrl,
-			tags = tags,
-			state = state,
-			author = author,
-			largeCoverUrl = largeCoverUrl,
-			description = description,
-			chapters = chapters,
-			source = source,
-		)
-
-		private fun MangaChapter.copyInternal(
-			url: String = this.url,
-			source: MangaSource = this.source,
-		) = MangaChapter(
-			id = id,
-			name = name,
-			number = number,
-			volume = volume,
-			url = url,
-			scanlator = scanlator,
-			uploadDate = uploadDate,
-			branch = branch,
-			source = source,
-		)
 	}
 }
diff --git a/app/src/main/kotlin/org/koitharu/kotatsu/tracker/ui/feed/model/FeedItem.kt b/app/src/main/kotlin/org/koitharu/kotatsu/tracker/ui/feed/model/FeedItem.kt
index bf9510a51..4aac9f87e 100644
--- a/app/src/main/kotlin/org/koitharu/kotatsu/tracker/ui/feed/model/FeedItem.kt
+++ b/app/src/main/kotlin/org/koitharu/kotatsu/tracker/ui/feed/model/FeedItem.kt
@@ -6,7 +6,7 @@ import org.koitharu.kotatsu.parsers.model.Manga
 
 data class FeedItem(
 	val id: Long,
-	val imageUrl: String,
+	val imageUrl: String?,
 	val title: String,
 	val manga: Manga,
 	val count: Int,
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 86ad9e5c6..311aa57d9 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -31,7 +31,7 @@ material = "1.13.0-alpha09"
 moshi = "1.15.2"
 okhttp = "4.12.0"
 okio = "3.9.1"
-parsers = "8ce6694232"
+parsers = "6abcdd8d4b"
 preference = "1.2.1"
 recyclerview = "1.3.2"
 room = "2.6.1"